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Title: Weathering of Roofing Materials-An Overview

Journal Article · · Construction and Building Materials
OSTI ID:929480

An overview of several aspects of the weathering of roofing materials is presented. Degradation of materials initiated by ultraviolet radiation is discussed for plastics used in roofing, as well as wood and asphalt. Elevated temperatures accelerate many deleterious chemical reactions and hasten diffusion of material components. Effects of moisture include decay of wood, acceleration of corrosion of metals, staining of clay, and freeze-thaw damage. Soiling of roofing materials causes objectionable stains and reduces the solar reflectance of reflective materials. (Soiling of non-reflective materials can also increase solar reflectance.) Soiling can be attributed to biological growth (e.g., cyanobacteria, fungi, algae), deposits of organic and mineral particles, and to the accumulation of flyash, hydrocarbons and soot from combustion.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; California Energy Commission
DOE Contract Number:
Report Number(s):
LBNL-59724; R&D Project: EK264L; TRN: US200813%%207
Journal Information:
Construction and Building Materials, Vol. 22, Issue 4; Related Information: Journal Publication Date: 04/2008
Country of Publication:
United States